Summer afternoons in Hartley are warmer than in 73% of UK towns
In January the night’s low is typically 1.6°C (35°F). Frosty nights outnumber those of 71% of UK towns. Rain peaks in October and eases off in July. Windscreens need scraping on about 46 mornings a year, the nights the air drops below 0°C.
Met Office 1991–2020 averages for the town itself.
A year in Hartley at a glance
Each month’s typical high and low, in °C.
What a year in Hartley feels like
Typical highs and lows by season and by month, from the Met Office’s 1991–2020 averages.
About 831 mm of rain a year
October is the wettest month and July the driest. About 25 days a year bring 10 mm (0.4 in) or more.
Rain by month
Millimetres
Sunshine by month
Hours of bright sunshine at Eastbourne
46 air frosts and 14 days of 25°C a year
On about 46 nights a year the air drops below freezing, and on about 1 days it stays below freezing all day. About 14 days a year reach 25°C (77°F).
Day counts are 1991–2020 averages from the Met Office’s 2 km grid. The Met Office calls a day of 25°C or more a summer day and a night below 0°C an air frost; ground frosts, on grass, come more often.
The Met Office station at Eastbourne
Eastbourne is 25 miles south of Hartley, 7 m (23 ft) above sea level. It is the nearest of the 37 long-running stations the Met Office publishes in full.
| Month | High | Low | Rain | Air frosts | Sun (hours) |
|---|---|---|---|---|---|
| January | 8.5°C | 3.9°C | 83 mm | 4.5 | 70 |
| February | 8.6°C | 3.6°C | 58 mm | 3.8 | 90 |
| March | 10.5°C | 4.9°C | 48 mm | 1.1 | 134 |
| April | 13.3°C | 6.7°C | 45 mm | 0.2 | 203 |
| May | 16.3°C | 9.6°C | 46 mm | 0.0 | 236 |
| June | 18.9°C | 12.5°C | 47 mm | 0.0 | 239 |
| July | 21.0°C | 14.7°C | 54 mm | 0.0 | 252 |
| August | 21.3°C | 14.9°C | 60 mm | 0.0 | 233 |
| September | 19.2°C | 12.6°C | 60 mm | 0.0 | 172 |
| October | 15.7°C | 9.9°C | 93 mm | 0.0 | 121 |
| November | 11.9°C | 6.9°C | 98 mm | 0.6 | 78 |
| December | 9.3°C | 4.5°C | 100 mm | 3.8 | 62 |
| Year | 14.5°C | 8.7°C | 792 mm | 14 | 1,889 |
Met Office historic station data, Eastbourne, 1991–2020 months averaged (a month needs 20 of the 30 years; estimated values counted, missing months left out). Sunshine: Campbell-Stokes recorder.
How Hartley compares
Against the 2,537 towns and cities of 2,500 or more across the UK, each with its own Met Office averages, and its place among Kent towns that size.
Nearby towns’ climate
The nearest towns of 1,000+ within 12 miles: a hill, a valley or the sea can make a real difference over a few miles.
| Town | July high | January low | Rain a year |
|---|---|---|---|
| Hartley | 22.3°C | 1.6°C | 831 mm |
| Cranbrook 1.2 mi | 22.3°C about the same | 1.6°C about the same | 821 mm |
| Hawkhurst 2.9 mi | 22.2°C about the same | 1.8°C about the same | 831 mm |
| Goudhurst 3.0 mi | 22.3°C about the same | 1.6°C about the same | 822 mm |
| Benenden 3.1 mi | 22.5°C about the same | 1.7°C about the same | 786 mm |
| Horsmonden 5.0 mi | 22.7°C about the same | 1.8°C about the same | 707 mm |
| Hurst Green 5.0 mi | 22.2°C about the same | 1.8°C about the same | 828 mm |
Hartley weather by month
Average daily high and low, mean temperature and rain, 1991–2020, for the town itself (the Met Office’s HadUK-Grid).
| Month | High | Low | Mean | Rain |
|---|---|---|---|---|
| January | 7.6°C 46°F | 1.6°C 35°F | 4.6°C | 91 mm 3.6 in |
| February | 8.1°C 47°F | 1.5°C 35°F | 4.8°C | 66 mm 2.6 in |
| March | 10.7°C 51°F | 2.8°C 37°F | 6.8°C | 50 mm 1.9 in |
| April | 13.8°C 57°F | 4.4°C 40°F | 9.1°C | 54 mm 2.1 in |
| May | 17.0°C 63°F | 7.2°C 45°F | 12.1°C | 54 mm 2.1 in |
| June | 19.9°C 68°F | 9.9°C 50°F | 14.9°C | 50 mm 2.0 in |
| July | 22.3°C 72°F | 12.1°C 54°F | 17.2°C | 49 mm 1.9 in |
| August | 22.2°C 72°F | 12.0°C 54°F | 17.1°C | 64 mm 2.5 in |
| September | 19.2°C 67°F | 9.7°C 49°F | 14.5°C | 60 mm 2.4 in |
| October | 15.2°C 59°F | 7.0°C 45°F | 11.1°C | 99 mm 3.9 in |
| November | 11.0°C 52°F | 4.1°C 39°F | 7.5°C | 96 mm 3.8 in |
| December | 8.1°C 47°F | 1.9°C 35°F | 5.0°C | 99 mm 3.9 in |
| Year | 14.6°C | 6.2°C | 10.4°C | 831 mm |
Where Hartley’s numbers come from
Averages over 30 years, not a forecast.
- Mean temperature, rain and day counts: HadUK-Grid 1991–2020 averages for the Met Office 2 km grid square nearest Hartley’s centre (the town is smaller than one square).
- Highs and lows: the Met Office publishes average daily maxima and minima on its 12 km grid; each is moved by the difference between the town’s 2 km mean temperature and the 12 km square’s, which carries the town’s own height and setting over.
- Weather station and sunshine: Met Office historic station data for Eastbourne, 25 miles away, months of 1991–2020 averaged.
- Comparisons: every town and city of 2,500 or more across the UK, all four nations, read the same way.
Met Office HadUK-Grid · Met Office Climate Data Portal · Historic station data. Open Government Licence v3.0.
Questions about Hartley’s climate
How warm does Hartley get in summer?
July is the warmest month, with average highs of 22.3°C (72°F). About 14 days a year reach 25°C (77°F), more than 69% of UK towns.
How cold does Hartley get in winter?
February nights average 1.5°C (35°F). The air drops below freezing on about 46 nights a year, and about 1 days a year stay below freezing all day.
How much rain does Hartley get?
About 831 mm (33 in) a year, more than 59% of UK towns. October is the wettest month (99 mm) and July the driest (49 mm).
How sunny is it?
The nearest Met Office station with a sunshine record, Eastbourne (25 miles away), averages 1,889 hours of bright sunshine a year. Sunshine isn’t on the town grid, so this is the station’s figure.
Where do these figures come from?
The Met Office’s HadUK-Grid 1991–2020 averages, which turn thousands of weather stations into a map of the UK in 2 km squares; the page reads the squares inside Hartley. They are 30-year averages, not a forecast.
Contains Met Office data © Crown copyright 2026, Open Government Licence v3.0. HadUK-Grid 1991–2020 averages via the Met Office Climate Data Portal; station averages from Met Office historic station data. Today’s forecast for Hartley →
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